import functools
# 共用的自定义工具类
from flask import current_app
from flask import g
from flask import session

from info.models import User


def do_index_class(index):
    # 返回指定索引对应的类名
    if index == 0:
        return 'first'
    elif index == 1:
        return 'second'
    elif index == 2:
        return 'third'


def user_login_data(f):
    # s使用function.wraps去装饰内层函数,可以保持当前装饰器去装饰的函数的__name__的值不变
    @functools.wraps(f)
    def wrapper(*args, **kwargs):
        user_id = session.get('user_id', None)
        user = None
        if user_id:
            # 尝试查询用户模型
            try:
                user = User.query.get(user_id)
            except Exception as e:
                current_app.logger.error(e)
        g.user = user

        return f(*args, **kwargs)
    return wrapper


# def query_user_data():
#     # 显示用户是否登陆逻辑
#     # 取到用户id
#     user_id = session.get('user_id', None)
#     user = None
#     if user_id:
#         # 尝试查询用户模型
#         try:
#             user = User.query.get(user_id)
#         except Exception as e:
#             current_app.logger.error(e)
#
#         return user
#     return None